Hipokrat 2000 PS Diz Protezi

Hipokrat 2000 PS Diz Protezi

Tasarım
• Slightly more constrained prosthesis that requires sacrifice of PCL
• Resection of PCL increases the flexion gap in relationship to extension gap so posterior must be matched to avoid flexion-extension mismatch
• Femoral component contains a cam that engages the tibial polyethylene post during flexion
• Polyethylene inserts are more congruent, or deeply “dished”

Endikasyonlar
• Previous patellectomy
• Reduces risk of potential anteroposterior instability in setting of a weak extensor mechanism
• Inflammatory arthritis
• Inflammatory arthritis may lead to late PCL rupture
• Deficient or absent PCL

Radyografiler
Lateral radiograph will show the outline of the cam, or box, in the femoral component

Avantajlar
• Easier to balance a knee with absent PCL
• Arguably more range of motion
• Easier surgical exposure

Dezavantajlar
• Cam jump mechanism with loose flexion gap, or in hyperextension, the cam can rotate over the post and dislocate treatment initial closed reduction by performing an anterior drawer maneuver final revision to address loose flexion gap
• Tibial post polyethylene wear
• Patellar “clunk” syndrome mechanism scar tissue gets caught in box as knee moves into extension treatment arthroscopic versus open resection of scar tissue
• Additional bone is cut from distal femur to balance extension gap

Kategoriler:

The femoral implant compresing of 3 sliding surfaces in contact with polyethelene, is a Cr.Co alloy who’s reliability needs no further proof. The patellar groove is deeply hollowed and presents an anatomically aligned outline. This feature serves for better patellar guidance and relief of strain on the knee extensor apparatus. The femoral component is available in a cemented and a non-cemented version. A cruciate retaining version is also available.

• Anatomical 9 sizes femoral compenent offers optimal fit
• MRI safe Conditional option
• Cr.Co.Mo. alloy
• Rough inner surface provides strong cementation
• Cemented and Uncemented options
• Anatomic patellofemoral track
• Deep patella groove provides stable pattelofemoral tracking
• 7 degree anterior flange

The tibial insert of ‘‘HİPOKRAT 2000 knee prosthesis’’ is an polyethelene high density .This choice is motivated by the excelent mechanical properties of this materials both in its strength and its tribological (low friction) qualities. This High density materials, proved for many years in the most reliable hip and knee prostheses, stil being unequalled today. It is here meticulously machined on specific dedicated machining centres, eliminating all risks of contamination. The tibial insert is available in 6 different heights of 6, 8, 10, 12, 15 and 18 mm so that the joint height can be restored depending on the degree of tibial bone substance loss. An ultracongruent and a cruciate retaining version is also available.

• Higher anterior surface will prevent the paradoxial anterior sliding
• Captured attachment screw
• 5 Sizes, 6 thicknesses (6, 8, 10, 12, 15 and 18 mm)
• Anatomic radius
• UHMWPE pollyethelene

The tibial plate has been designed in Cr.Co.Mo., and have rough inner surface to provides strong cementation. A locking screw which completely locks the tibial insert and ensures positive anchorage (without the slightest risk of the system being ejected). We add a final security. This locking screw is itself fitted with a locking mechanism.

• 9 sizes offers optimal fit
• MRI safe Conditional option
• Cr.Co.Mo. alloy
• Improved locking mechanism design
• Wings growing according to the size to ensure better stability.

The patella is an polyethelene with offers the most ceratin contact and friction behaviour with the Cr.Co. trocchlea. Patellar implant is designed to help fill in lost patellar bone, restoring the patellofemoral joint space to its normal height.

• Smooth anatomical design
• UHMWPE pollyethelene
• 5 different diameter (31, 33, 35, 37 and 39 mm)
• Choice of one-peg and three-peg fixation modes are avaliable for increased flexibility

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